Epigenetic control of plant immunity

ALVAREZ MARIA ELENA; NOTA FLORENCIA; CAMBIAGNO DAMIAN

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2010 vol. 11 p. 563 - 563

n eukaryotic genomes, gene expression and DNA recombination are affected by structural chromatin traits. Chromatin structure is shaped by the activity of enzymes that either introduce covalent modifications in DNA and histone proteins or use energy from ATP to disrupt histone?DNA interactions. The genomic ?marks? that are generated by covalent modifications of histones and DNA, or by the deposition of histone variants, are susceptible to being altered in response to stress. Recent evidence has suggested that proteins generating these epigenetic marks play crucial roles in the defence against pathogens. Histone deacetylases are involved in the activation of jasmonic acid- and ethylene-sensitive defence mechanisms.ATP-dependent chromatin remodellers mediate the constitutive repression of the salicylic acid-dependent pathway, whereas histone methylation at the WRKY70 gene promoter affects the activation of this pathway. Interestingly, bacterial-infected tissues sho